RedBull Stratos...Felix Baumgartner....700mph+ FreeFall
Discussion
Eric Mc said:
I presume you are concerned about the atmospheric heat friction that is normally associated with a spacecraft or satellite re-entering the atmosphere from earth orbit (or even direct from the moon, as in Apollo and Zond missions).
Atmospheric heating is not a function of altitude. It is a function of speed.
If you climbed a tower 100 miles high - you would be in space. If you jumped off that tower and started falling towards earth, your velocity would never exceed 800 mph - and at that speed frictional heating due to the atmopshere would be almot undetectable.
If you are in orbit around the earth at an altitude of 100 miles, you will start entering the atmosphere at 17,500 mph (25.000 mph if coming back from the moon). At those types of speeds atmospheric heating is a major issue and a specially designed heat shield of some sort is required to prevent the spacecraft from burning and breaking up.
Thanks for that, it was the heat of re-entry I was think about, I thought I had put that, in my defence it was pre-coffee. Very interesting.Atmospheric heating is not a function of altitude. It is a function of speed.
If you climbed a tower 100 miles high - you would be in space. If you jumped off that tower and started falling towards earth, your velocity would never exceed 800 mph - and at that speed frictional heating due to the atmopshere would be almot undetectable.
If you are in orbit around the earth at an altitude of 100 miles, you will start entering the atmosphere at 17,500 mph (25.000 mph if coming back from the moon). At those types of speeds atmospheric heating is a major issue and a specially designed heat shield of some sort is required to prevent the spacecraft from burning and breaking up.
Council Baby said:
kit80 said:
I have booked to do an AFF next year, can’t wait.
Where are you doing it? I was due to do it last month in Florida but now not until next year due to the mangled arm.It's dark and nothing is happening
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